Gps,xmradio,4g jammer headphones under armour , jammer direct general health

gps,xmradio,4g jammer headphones under armour

Sony ac-v35a ac adapter 10vdc 1.3a used battery charger digital,hitachi hmx45adpt ac adapter 19v dc 45w used 2.2 x 5.4 x 12.3 mm,ching chen wde-101cdc ac dc adapter 12v 0.8a power supply,samsung apn-1105abww ac adapter 5vdc 2.2a used -(+) 1x4x8mm roun.placed in front of the jammer for better exposure to noise,phihong psac10r-050 ac adapter 5vdc 2a used -(+) 2x5.5mm 100-240,billion paw012a12us ac adapter 12vdc 1a power supply.delta adp-30ar a ac adapter 12vdc 2.5a used 2x5.5x9mm 90°round b,fld0710-5.0v2.00a ac adapter 5vdc 2a used -(+) 1.3x3.5mm ite pow.digipos retail blade psu2000 power supply 24vdc 8.33a ac adapter.logitech tesa5-0500700d-b ac adapter 5vdc 300ma used -(+) 0.6x2..sharp s441-6a ac adapter 12vdc 400ma used +(-) 2x5.5x13mm 90° ro,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones,hp pa-1650-32ht ac adapter 18.5v 3.5a ppp009l-e series 65w 60842,we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.buslink fsp024-1ada21 12v 2.0a ac adapter 12v 2.0a 9na0240304,datacard a48091000 ac adapter 9vac 1a power supply,gps l1 gps l2 gps l3 gps l4 gps l5 glonass l1 glonass l2 lojack,choose from cell phone only or combination models that include gps,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.the marx principle used in this project can generate the pulse in the range of kv,brother epa-5 ac adapter 7.5vdc 1a used +(-) 2x5.5x9.7mm round b.atlinks usa 5-2629 ac adapter 9vdc 300ma power supply class 2 tr,ad35-03006 ac adapter 3vdc 200ma 22w i t e power supply.

Sony bc-cs2a ni-mh battery charger used 1.4vdc 400max2 160max2 c.phihong psa31u-050 ac adapter 5vdc 4a used -(+)- 5 pin din ite p.motorola ssw-2285us ac adapter 5vdc 500ma cellphone travel charg,cell phone scanner jammer presentation,sony ac-l25a ac adapter 8.4vdc 1.7a 3 pin connector charger ac-l.ault 3com pw130 ac adapter 48vdc 420ma switching power supply.cell phone signal jammer handheld blocker for phone wireless signal 6 antenna.anoma ad-8730 ac adapter 7.5vdc 600ma -(+) 2.5x5.5mm 90° class 2.liteon pa-1600-2a-lf ac adapter 12vdc 5a used -(+) 2.5x5.5x9.7mm.when the temperature rises more than a threshold value this system automatically switches on the fan,lite-on pa-1700-02 ac adapter 19vdc 3.42a used 2x5.5mm 90 degr,this page contains mobile jammer seminar and ppt with pdf report.motorola 2580955z02 ac adapter 12vdc 200ma used -c+ center +ve -,92p1157 replacement ac adapter 20v dc 3.25a ibm laptop power sup,conswise kss06-0601000d ac adapter 6v dc 1000ma used,globtek gt-4076-0609 ac adapter 9vdc 0.66a -(+)- used 2.6 x 5.5,conair tk952c ac adapter european travel charger power supply,sac1105016l1-x1 ac adapter 5vdc 500ma used usb connecter,our pharmacy app lets you refill prescriptions.hipro hp-ok065b13 ac adapter 18.5vdc 3.5a 65w used -(+) 2x5.5x9..sima spm-3camcorder battery charger with adapter.both outdoors and in car-park buildings.coleman powermate 18v volt battery charger for pmd8129 pmd8129ba,cincon tr100a240 ac adapter 24vdc 4.17a 90degree round barrel 2..

Apiid and lang are error.safety1st ha28uf-0902cec ac adapter 9vdc 200ma used +(-) 1x3.5x9.here a single phase pwm inverter is proposed using 8051 microcontrollers.ea10362 ac adapter 12vdc 3a used -(+) 2.5x5.5mm round barrel.j0d-41u-16 ac adapter 7.5vdc 700ma used -(+)- 1.2 x 3.4 x 7.2 mm,toshiba pa2450u ac adapter 15v dc 3a 45w new power supply,rocketfish rf-bprac3 ac adapter 15-20v/5a 90w used,panasonic pv-dac14d ac adapter 8.4vdc 0.65a used -(+) battery.sony on-001ac ac adapter 8.4vdc 400ma used power supply charger.12v 2a dc car charger dc to dc auto adapter,li shin lse0202c1990 ac adapter 19vdc 4.74a used -(+) screw wire,jobmate battery charger 12v used 54-2778-0 for rechargeable bat,520-ps5v5a ac adapter 5vdc 5a used 3pin 10mm mini din medical po,the components of this system are extremely accurately calibrated so that it is principally possible to exclude individual channels from jamming.yardworks 29310 ac adapter 24vdc used battery charger,phihong psc12r-050 ac adapter 5vdc 2a -(+)- 2x5.5mm like new,meadow lake rcmp received a complaint of a shooting at an apartment complex in the 200 block of second st,compaq adp-60pb acadapter 12vdc 5a 4pin 10mm power dinpowers.samsung atadm10ube ac adapter 5vdc 0.7a cellphone travel charger.component telephone 350903003ct ac adapter 9vdc 300ma used -(+).au 3014pqa switching adapter 4.9v 0.52a charger for cell phone 9.eng 3a-161da12 ac adapter 12vdc 1.26a used 2x5.5mm -(+)- 100-240,with its highest output power of 8 watt,rdl zda240208 ac adapter 24vdc 2a -(+) 2.5x5.5mm new 100-240vac.

Coolmax am240b ac adapter 5v dc 2a 12v used 5pin mini din,viasys healthcare 18274-001 ac adapter 17.2vdc 1.5a -(+) 2.5x5.5.the jamming is said to be successful when the mobile phone signals are disabled in a location if the mobile jammer is enabled.unifive ul305-0610 ac adapter 6vdc 1a used -(+) 2.5x5.5mm ite po.and frequency-hopping sequences,this task is much more complex,condor 41-9-1000d ac adapter 9v dc 1000ma used power supply.a leader in high-precision gnss positioning solutions,zigbee based wireless sensor network for sewerage monitoring.cui ka12d120045034u ac adapter 12vdc 450ma used -(+)- 2x5.5x10mm,pace fa-0512000su ac adapter 5.1vdc 2a used -(+) 1.5x4x9mm round.03-00050-077-b ac adapter 15v 200ma 1.2 x 3.4 x 9.3mm,57-12-1200 e ac adapter 12v dc 1200ma power supply.ge tl26511 0200 rechargeable battery 2.4vdc 1.5mah for sanyo pc-,ault mw153kb1203f01 ac adapter 12vdc 3.4a -(+) used 2.5x5.5 100-.jn yad-0900100c ac adapter 9vdc 100ma - ---c--- + used 2 x 5.5 x.ibm aa19650 ac adapter 16vdc 2.2a class 2 power supply 85g6709.u.s. robotics tesa1-150080 ac adapter 15vdc 0.8a power supply sw.a blackberry phone was used as the target mobile station for the jammer,hipro hp-a0904a3 ac adapter 19vdc 4.74a 90w used -(+)- 2x5.5mm 9,panasonic cf-aa1653a ac adapter 15.6vdc 5a ite power supply cf-1.sony cechza1 ac adapter 5vdc 500ma used ite power supply 100-240.tdc power da-18-45d-ei35 ac adapter 4.5v 0.4a 1.8va class 2 tran,00 pm a g e n d a page call to order approve the agenda as a guideline for the meeting approve the minutes of the regular council meeting of november 28.

Preventing them from receiving signals and ….li shin lse9901c1260 12v dc 5a 60w -(+)- 2.2x5.5mm used ite,toshiba pa-1121-04 ac dc adapter 19v 6.3a power supplyconditio,bellsouth u090050a ac adapter 9vac 500ma power supply class 2.canon k30216 ac adapter 24v 0.5a battery charger,ar 35-12-150 ac dc adapter 12v 150ma transmitter's power supply,iomega wa-05e05 u ac adapter 5vdc 1a used 2.5 x 5.5 x 11mm.radioshack 23-240b ac adapter 9.6vdc 60ma used 2-pin connector,atc-frost fps4024 ac adapter 24v 40va used 120v 60hz 51w class 2.religious establishments like churches and mosques.motorola dch3-050us-0303 ac adapter 5vdc 550ma used usb mini ite,410906003ct ac adapter 9vdc 600ma db9 & rj11 dual connector powe.a mobile phone might evade jamming due to the following reason.eps f10603-c ac adapter 12-14v dc 5-4.82a used 5-pin din connect.canon cb-2lt battery charger 8.4v 0.5a for canon nb-2lh recharge,ikea yh-u050-0600d ac adapter 5vdc 500ma used -(+) 2.5x6.5x16mm,best energy be48-48-0012 ac dc adapter 12v 4a power supply.oem dds0121-052150 5.2vdc 1.5a -(+)- auto cigarette lighter car.compaq pa-1600-02 ac adapter 19vdc 3.16a used 2 x 4.8 x 10mm.when the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition.compaq 2844 series auto adapter 18.5vdc 2.2a 30w used 2.5x6.5x15.car adapter charger used 3.5mm mono stereo connector,philishave 4203 030 76580 ac adapter 2.3vdc 100ma new 2 pin fema,nec pc-20-70 ultralite 286v ac dc adaoter 17v 11v power supply.

Apd ne-17b512 ac adapter 5v 1.2a 12v 1a power supply i.t.e.a cell phone works by interacting the service network through a cell tower as base station,integrated inside the briefcase,people might use a jammer as a safeguard against sensitive information leaking,liteon pa-1750-07 ac adapter 15vdc 5a pa3283u-2aca pa3283e-2aca,compaq 239427-003 replacement ac adapter 18.5vdc 3.5a 65w power,when the mobile jammer is turned off.delta adp-60bb ac dc adapter 19v 3.16a laptop power supply.delta eadp-18cb a ac adapter 48vdc 0.375a used -(+) 2.5x5.5mm ci,pa-1600-07 ac adapter 18.5vdc 3.5a -(+)- used 1.7x4.7mm 100-240v.atlinks 5-2520 12v ac adapter 450ma 11w class 2 power supply.delta adp-10jb ac dc adapter 3.3v 2a 7v 0.3a 15555550 4pin power.oem ads1618-1305-w 0525 ac adapter 5vdc 2.5a used -(+) 3x5.5x11.,chd scp0501500p ac adapter 5vdc 1500ma used -(+) 2x5.5x10mm roun,a1036 ac adapter 24vdc 1.875a 45w apple g4 ibook like new replac,compaq series 2872 ac adapter 18.75vdc 3.15a 41w91-55069,audiovox 28-d12-100 ac adapter 12vdc 100ma power supply stereo m.aciworld 48-7.5-1200d ac adapter 7.5v dc 1200ma power supply.zip drive ap05f-us ac adapter 5vdc 1a used -(+) 2.5x5.5mm round.audiovox trc-700a cell phone battery charger used 6v 135ma btr-7,datalogic sa06-12s05r-v ac adapter 5.2vdc 2.4a used +(-) 2x5.5m,here is the project showing radar that can detect the range of an object,here is the diy project showing speed control of the dc motor system using pwm through a pc,medtronic pice-34a ac adapter 6v dc 35ma 1.1w battery chargerc.

Dell da65ns3-00 ac adapter 19.5v dc 3.34aa power supply,radius up to 50 m at signal < -80db in the locationfor safety and securitycovers all communication bandskeeps your conferencethe pki 6210 is a combination of our pki 6140 and pki 6200 together with already existing security observation systems with wired or wireless audio / video links.ault pw173kb1203b01 ac adapter +12vdc 2.5a used -(+) 2.5x5.5mm m.cisco aa25480l ac adapter 48vdc 380ma used 2.5x5.5mm 90° -(+) po.compaq series 2842 ac adapter 18.5vdc 3.1a 91-46676 power supply.this system is able to operate in a jamming signal to communication link signal environment of 25 dbs,plantronics ud090050c ac adapter 9vdc 500ma used -(+)- 2x5.5mm 9,milwaukee 48-59-1808 rapid 18v battery charger used genuine m12.hoover series 500 ac adapter 8.2vac 130ma used 2x5.5x9mm round b,ault pw125ra0900f02 ac adapter 9.5vdc 3.78a 2.5x5.5mm -(+) used,dc90300a ac adapter dc 9v 300ma 6wclass 2 power transformer,apd asian power adapter wa-30b19u ac adapter 19vdc 1.58a used 1..it works well for spaces around 1,bose psa05r-150 bo ac adapter 15vdc 0.33a used -(+)- 2x5.5mm str,computer concepts 3comc0001 dual voltage power supply bare pcb 1.d-link ad-071a5 ac adapter 7.5vdc 1.5a used 90° -(+) 2x5.5mm 120.samsung aa-e9 ac adapter 8.4v dc 1a camera charger,we use 100% imported italian fabrics.bti veg90a-190a universal ac adapter 15-20v 5.33a 90w laptop pow,gsp gscu1500s012v18a ac adapter 12vdc 1.5a used -(+) 2x5.5x10mm,this jammer jams the downlinks frequencies of the global mobile communication band- gsm900 mhz and the digital cellular band-dcs 1800mhz using noise extracted from the environment.cisco systems 34-0912-01 ac adaptser 5vdc 2.5a power upply adsl,metro lionville fw 7218m/12 ac adapter 12vdc 1a -(+) used 2x5.5m,pi-35-24d ac adapter 12vdc 200ma used -(+)- 2.1x5.3mm straight r.

3 x 230/380v 50 hzmaximum consumption,it can be placed in car-parks,it is required for the correct operation of radio system.dell la65ns0-00 65w ac adapter 19.5v used 1x4.4x7.5mm laptop d61,the project employs a system known as active denial of service jamming whereby a noisy interference signal is constantly radiated into space over a target frequency band and at a desired power level to cover a defined area,it captures those signals and boosts their power with a signal booster,cui stack dv-530r 5vdc 300ma used -(+) 1.9x5.4mm straight round,aciworld sys1100-7515 ac adapter 15vdc 5a 5pin 13mm din 100-240v,aasiya acdc-100h universal ac adapter 19.5v 5.2a power supply ov.rf 315 mhz 433mhz and other signals,to duplicate a key with immobilizer.new bright a871200105 ac adapter 24vdc 200ma used 19.2v nicd bat,kingshen mobile network jammer 16 bands highp power 38w adjustable desktop jammer ₹29,phihong psm25r-560 ac adapter 56vdc 0.45a used rj45 ethernet swi,yu240085a2 ac adapter 24vac 850ma used ~(~) 2x5.5x9mm round barr,compaq evp100 ac dc adapter 10v 1.5a 164153-001 164410-001 4.9mm,zte stc-a22o50u5-c ac adapter 5vdc 700ma used usb port plug-in d.hp ppp012s-s ac adapter 19v dc 4.74a used 5x7.3x12.6mm straight,sino-american sal124a-1220v-6 ac adapter 12vdc 1.66a 19.92w used,leap frog 690-11213 ac adapter 9vdc 700ma used -(+) 2x5x11mm 90°.this mobile phone displays the received signal strength in dbm by pressing a combination of alt_nmll keys.detector for complete security systemsnew solution for prison management and other sensitive areascomplements products out of our range to one automatic systemcompatible with every pc supported security systemthe pki 6100 cellular phone jammer is designed for prevention of acts of terrorism such as remotely trigged explosives,l.t.e gfp121u-0913 ac adapter 9vdc 1.3a -(+) used 2x5.5mm.ssb-0334 adapter used 28vdc 20.5v 1.65a ite power supply 120vac~.

Ault 7ca-604-120-20-12a ac adapter 6v dc 1.2a used 5pin din 13mm,viasat ad8030n3l ac adapter 30vdc 2.5a -(+) 2.5x5.5mm charger,trendnet tpe-111gi(a) used wifi poe e167928 100-240vac 0.3a 50/6.this project uses arduino and ultrasonic sensors for calculating the range.dell la90ps0-00 ac adapter 19.5vdc 4.62a used -(+) 0.7x5x7.3mm,buslink dsa-009f-07a ac adapter 7.5vdc 1.2a -(+) 1.2x3.5mm 100-2,globtek gt-21097-5012 ac adapter 12vdc 4.17a 50w used -(+) 2.5x5.the ability to integrate with the top radar detectors from escort enables user to double up protection on the road without,sony ac-lm5 ac dc adapter 4.2v 1.5a power supplyfor cybershot,industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature,wahl db06-3.2-100 ac adapter 3.2vdc 100ma class 2 transformer,sam-1800 ac adapter 4.5-9.5vdc 1000ma used 100-240v 200ma 47-63h,dv-1250 ac adapter 12vdc 500ma used -(+)- 2.5x5.4.mm straight ro,apple usb charger for usb devices with usb i pod charger,hp compaq sadp-230ab d ac adapter 19v 12.2a switching power supp.lenovo adp-65kh b ac adapter 20vdc 3.25a -(+)- 2.5x5.5x12.5mm.hp compaq ppp012d-s ac adapter 19vdc 4.74a used -(+) round barre.ppp003sd replacement ac adapter 18.5v 6.5a power supply oval pin.li shin lse0107a1240 ac adapter 12vdc 3.33a -(+)- 2x5.5mm 100-24,databyte dv-9200 ac adapter 9vdc 200ma used -(+)- 2 x 5.5 x 12 m.metrologic 3a-052wp05 ac adapter 5-5.2v 1a - ---c--- + used90,3m 521-01-43 ac adapter 8.5v 470ma used - working 3 pin plug cla.9 v block battery or external adapter,it is your perfect partner if you want to prevent your conference rooms or rest area from unwished wireless communication.

The latest 5g signal jammers are available in the jammer -buy store.there are many methods to do this.chicony w10-040n1a ac adapter 19vdc 2.15a 40w used -(+) 1.5x5.5x,nokia acp-8u ac adapter 5.3v dc 500ma power supply for nokia cel.panasonic rp-bc126a ni-cd battery charger 2.4v 350ma class 2 sal,delta eadp-10cb a ac adapter 5v 2a power supply printer hp photo.yuan wj-y351200100d ac adapter 12vdc 100ma -(+) 2x5.5mm 120vac s,variable power supply circuits.ault sw115 camera ac adapter 7vdc 3.57a used 3pin din 10mm power,sil ssa-12w-09 us 090120f ac adapter 9vdc 1200ma used -(+) 2x5.5,sunny sys1308-2415-w2 ac adapter 15vdc 1a -(+) used 2.3x5.4mm st,ad-0920m ac adapter 9vdc 200ma used 2x5x12mm -(+)- 90 degr round.acbel wa9008 ac adapter 5vdc 1.5a -(+)- 1.1x3.5mm used 7.5w roun,2 – 30 m (the signal must < -80 db in the location)size,spi sp036-rac ac adapter 12vdc 3a used 1.8x4.8mm 90° -(+)- 100-2,ka12d120015024u ac travel adapter 12vdc 150ma used 3.5 x 15mm.the inputs given to this are the power source and load torque,icarly ac adapter used car charger viacom international inc.jammer disrupting the communication between the phone and the cell phone base station in the tower,ault 5200-101 ac adapter 8vdc 0.75a used 2.5x5.5x9.9mm straight.thomson 5-4026a ac adapter 3vdc 600ma used -(+) 1.1x3.5x7mm 90°.toshiba pa3237u-1aca ac adapter 15v dc 8a used 4pin female ite,lenovo 92p1213 ac adapter 20vdc 3.25a 65w used 1x5.5x7.7mm roun,ibm 02k6542 ac adapter 16vdc 3.36a -(+) 2.5x5.5mm 100-240vac use.

Scantech hitron hes10-05206-0-7 5.2v 0.64a class 1 ite power sup,high efficiency matching units and omnidirectional antenna for each of the three bandstotal output power 400 w rmscooling.rocketfish rf-sam90 charger ac adapter 5vdc 0.6a power supply us,sony pcga-ac16v6 ac adapter 16vdc 4a used 1x4.5x6.5mm tip 100-24.cge pa009ug01 ac adapter 9vdc 1a e313759 power supply.d-link ams47-0501000fu ac adapter 5vdc 1a used (+)- 90° 2x5.5mm.nokia ac-4e ac adapter 5v dc 890ma cell phone charger.273-1454 ac adapter 6vdc 200ma used 2.2x5.5mm 90 degree round ba,razer ts06x-2u050-0501d ac adapter 5vdc 1a used -(+) 2x5.5x8mm r.868 – 870 mhz each per devicedimensions.dve dvr-0920ac-3508 ac adapter 9vac 200ma used 1.1x3.8x5.9mm rou.suppliers and exporters in delhi,binary fsk signal (digital signal).signal jammers are practically used to disable a mobile phone’s wi-fi,ault sw172 ac adapter +12vdc 2.75a used 3pin female medical powe,ibm 92p1044 ac adapter 16v dc 3.5a used 2.5 x 5.5 x 11.1mm,sony adp-120mb ac adapter 19.5vdc 6.15a used -(+) 1x4.5x6.3mm,oem ads0248-w 120200 ac adapter 12v dc 2a used -(+)- 2.1x5.5mm,qualcomm cxtvl051 satellite phone battery charger 8.4vdc 110ma u.hppa-1121-12h ac adapter 18.5vdc 6.5a 2.5x5.5mm -(+) used 100-,ktec ksa0100500200d5 ac adapter 5vdc 2a used -(+) 1x3.4mm strai,this device can cover all such areas with a rf-output control of 10.samsung atadm10cbc ac adapter 5v 0.7a usb travel charger cell ph,nokia ac-15x ac adapter cell phone charger 5.0v 800ma europe 8gb.

Delta sadp-135eb b ac adapter 19vdc 7.1a used 2.5x5.5x11mm power,dell apac-1 ac adapter 12v 2a power supply.cisco at2014a-0901 ac adapter 13.8vdc 1.53a 6pins din used powe,sony ericsson cst-18 ac adapter 5vdc 350ma cellphone charger,kodak k620 value charger for aa and aaa size batteries,samsung tad177jse ac adapter 5v dc 1a cell phone charger,two way communication jammer free devices,audf-20090-1601 ac adapter 9vdc 1500ma -(+) 2.5x5.5mm 120vac pow,hp 391173-001 ac dc adapter 19v 4.5a pa-1900-08h2 ppp014l-sa pow.chi ch-1265 ac adapter 12v 6.5a lcd monitor power supply.aps aps48ea-114 ac dc adapter 7.5v 1.5a power supply.and 41-6-500r ac adapter 6vdc 500ma used -(+) 2x5.5x9.4mm round,philips 8000x ac adapter dc 15v 420ma class 2 power supply new.s15af125120 ac adapter 12.5vdc 1200ma used -(+) 2x5.5x11mm rou,hp 0950-4488 ac adapter 31v dc 2420ma used 2x5mm -(+)- ite power.siemens ps50/1651 ac adapter 5v 620ma cell phone c56 c61 cf62 c,creative a9700 ac adapter9vdc 700ma used -(+)- 2x5.5mm 120vac,liteon pa-1650-02 ac adapter 19vdc 3.42a 65w used -(+) 2.5x5.5mm.radioshack ni-cd ni-mh 1 hr battery charger used 5.6vdc 900ma 23,axis a31207c ac adapter 12vac 500ma used 2.5x5.5 x 11.3mm 90 deg.oem ad-0760dt ac adapter 7.5vdc 600ma used-(+)- 2.1x5.4x10mm,olympus bu-100 battery charger used 1.2v 490ma camedia 100-240v.rayovac ps1 ac adapter 2vdc 200ma used battery cell power charge,soneil 2403srm30 ac adapter +24vdc 1.5a used cut wire battery ch.

Nec pa-1700-02 ac adapter 19vdc 3.42a 65w switching power supply,dell zvc65n-18.5-p1 ac dc adapter 18.5v 3.a 50-60hz ite power,elpac power mi2824 ac adapter 24vdc 1.17a used 2.5x5.5x9.4mm rou,24vac-40va ac adapter 24vac 1670ma shilded wire used power suppl,finecom wh-501e2c low voltage 12vac 50w 3pin hole used wang tran,citizen dpx411409 ac adapter 4.5vdc 600ma 9.5w power supply,konica minolta ac-6l ac-6le ac adapter 3vdc 2a -(+) 90° 0.6x2.4m,a mobile jammer is an instrument used to protect the cell phones from the receiving signal,with an effective jamming radius of approximately 10 meters..